Artificial tooth.



PATENTED MAY 12, 1908. L. & H. BBRNSTBIN.

ARTIFICIAL TOOTH.

APPLICATION FILED rnB.1z, 190a.

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UNITED STATES PATENT OFFICE.

LOUIS BERNSTEIN AND HENRY BERNSTEIN, OF NEW YORK, N. Y.

ARTIFICIAL TOOTH.

Application filed February 12, 1908.

To all whom it may concern:

Be it known that we, LoUrs BERNSTEIN and HENRY BERNSTEIN, citizens of the United States, and residents of the city, county, and State of New York, have invented certain new and useful Improvements in Artificial Teeth, of which the following is a specification.

This invention relates to that class of artificial teeth in which a facing of porcelain or other refractory substance is detachably secured to a metallic backing our object being to provide for such teeth a simple and efficient construction whereby a firm and stable connection shall be attained, although permitting the easy separation of the members as occasion may require. To this end the invention comprises various novel structural features of the facing and backing, as will be hereinafter described and claimed.

In the drawingsFigure 1 is a perspective view of an anterior tooth facing, to which our improvement is applied. Fig. 2 is a similar View of the'same, as connected to the backing. Fig. 3 is a vertical section, as on the line 3 3 of Fig. 2. Fig. 4 is a plan of the blank for the backing. Fig. 5 is an edge view thereof. Fig. 6 is a vertical section of'a posterior tooth embodying our invention.

A represents a facing of porcelain or the like, on the rear wall of which is .fixed an upwardly extending post a which is disposed slightly beyond and parallel with the wall of the facing. This post comprises one limb of an angular piece of metal whereof the other limb isiembedded and baked within the body of the facing. The rear wall of the facing is provided with two horizontal shoulders a, a the former of which extends below and supports the base or angle of the post, while the other shoulder a lies slightly above and forwardly of the free end of the post.

B represents a metallic backing for the facing. The blank forthis backing is stamped out of a plate as indicated in Figs. 4 and 5, to constitute the body I) having the side wings 1), lower recess or notch If, and upper extension b the upper edges of the side wings being bent forwardly to constitute lips b and the side and top edges of the extension being.

bent rearwardly to constitute flanges If, b, respectively. The width and depth of the recess or notch in the body are equal to the width and thickness respectively of the basal part of the post, or substantially so the vertical length of each of the side wings is equal Specification of Letters Patent.

Patented May 12, 1908.

Serial No. 415,473.

to the distance between the shoulders a, o or substantially so, and the internal width and height of the flanged extension I) are equal to the width and height respectively, of the post, or substantially so.

The blank having been formed as above described, the flanged extension 6 is bent or folded down upon the body of the plate to constitute therewith a longitudinal pocket or casing, as indicated in Figs. 2 and 3. This completes the backing.

To apply the porcelain facing to the metallic backing, the post of the former is hooked or inserted into the pocket or casing by way of the opening formed by the notch b the parts being pressed into close contact with each otherso that the lower portions of the side wings will snugly embrace the angular base of the post and rest squarely upon the shoulder a; that the flange or lip constitutin the lower portion of the pocket or casing will take against the lower edge of such shoulder, and that the lips on the upper edges of the respective wings will rest firmly upon the upper shoulder o A suitable liquid cement is interposed between the facing and the backing, and introduced into theinterior of the pocket or casing, so as to afford a detachable bond of union between the parts. Preferably the lateral edges of the post are notched or serrated, as at X, to insure the incorporation of the cementing medium there with.

In Fig. 6 is illustrated a vertical section of a posterior tooth to which our invention is applied. In this construction the post is preferably secured to the back of the facing A, some distance above the lower shoulder a, and the notch b in the backing is made of a sufficient depth to permit the side wings of the backing to rest on said shoulder. In other respects the construction is substantially similar to that first above described.

By our invention as hereinbofore described, it is obvious that a rigid and substantial'connection of the facing with the backing is secured,relative movement of the two members being prevented by the efficient interlocking thereof,and yet the facing may be readily removed from the backing and rea facaffixed thereto the lower or basal part of an up l receive the post, and having also a portion to engage the shoulder on the facing.

wardly extending post which lies slightly beyond and parallel with the rear wall of the facing, or substantially so, in combination with a metallic hacking consisting of a plate having imposed thereon a longitudinally flanged or channeled portion which constitutes a pocket co-extensive with the post, the mouth of said pocket being at its lower end, whereby the post may be inserted into the pocket and confined therein throughout its length.

2. An artificial tooth comprising a facing of porcelain or the like, having allixed there to the lower or basal part of an upwardly extending post which lies slightly beyond and parallel with the rear wall of the facing, or substantially so, in combination with a metallic backing consisting of a plate having imposed thereon a longitudinally flanged or channeled portion which constitutes a pocket co-extensive with the post, said plate being provided at its lower edge with a notch or recess leading to the pocket, whereby the post may be inserted into the pocket and confined therein throughout its length, and the lower or basal end of the post be embraced by the notched portion of the plate.

3. An artificial tooth comprising a facing, of porcelain or the like, having on its rear wa a shoulder, and also an upwardly extending post, in combination with a metallic backing consisting of a plate having a fianged extension which is imposed upon the body of the plate to constitute a pocket or casing to 4. An artificial tooth comprising a facing, of 'iorcelain or the like, having on its rear wal a shoulder, and also an upwardly extending post, in combination with a metallic backing consisting of a plate having a flanged extension which is imposed upon the body of the plate to constitute a pocket or casing to receive the post, said plate having a notched or recessed portion to embrace the base of said post, and also a portion to engage the shoulder on the facing.

5. An artificial tooth comprising a facing, of porcelain or the like, having on its rear wall upper and lower shoulders, and also an upwardly extending post, in combination with a metallic backing consisting of a plate having a flanged extension which is bent upon the body of the plate to constitute a pocket or casing to receive said post, said plate having side wings which rest upon the lower shoulder, and also a notched portion which embraces the base of said post, and the said wings having lips which engage the upper shoulder.

Signed at New York in the county of New York and State of New York this 8th day of February A. D. 1908.

LOUIS BERNSTEIN. HENRY BERNSTEIN.

itnesses E. C. KERDOLFF, JOHN R. NOLAN. 

